// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_QUIC_TEST_TOOLS_MOCK_RANDOM_H_
#define NET_QUIC_TEST_TOOLS_MOCK_RANDOM_H_

#include <stddef.h>
#include <stdint.h>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "net/quic/crypto/quic_random.h"

namespace net {
namespace test {

    class MockRandom : public QuicRandom {
    public:
        // Initializes base_ to 0xDEADBEEF.
        MockRandom();
        explicit MockRandom(uint32_t base);

        // QuicRandom:
        // Fills the |data| buffer with a repeating byte, initially 'r'.
        void RandBytes(void* data, size_t len) override;
        // Returns base + the current increment.
        uint64_t RandUint64() override;
        // Does nothing.
        void Reseed(const void* additional_entropy, size_t entropy_len) override;

        // ChangeValue increments |increment_|. This causes the value returned by
        // |RandUint64| and the byte that |RandBytes| fills with, to change.
        void ChangeValue();

    private:
        uint32_t base_;
        uint8_t increment_;

        DISALLOW_COPY_AND_ASSIGN(MockRandom);
    };

} // namespace test
} // namespace net

#endif // NET_QUIC_TEST_TOOLS_MOCK_RANDOM_H_
